Grab-bucket.



F. B. &. J. J. GALLAHAN.

GRAB BUCKET.

APPLICATION mum FEB. 11, 1913.

1,1 17,549. Patented Nov. 17, 1914 2 SHEETS-SHEET 1.

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GRAB BUCKET.

APPLICATION IILED FEB.17,1913.

1,1 17,549. Patented Nov. 17, 1914,

2 SHEBTS-SHEET 2.

22 255525: .[zzzrszzzars LTNTTE STATES PATENT OFFICE.

FRANK E. CALLAHAN AND JAMES J. CALLAHAN, 0F CLEVELAND, OHIO.

GRAB-BUCKET.

To all whom. it may concern:

Be it known that we, FRANK E. CALLAHAN and JAMES J. CALLAHAN, citizens of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a certain new and useful Improvement in Grab-Buckets, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to grab buckets of the clam-shell type, such as are commonly usedin excavating and in the handling of coal, ore, and other such materials, and which comprise, generally, two jaws which are pivoted at their inner ends to a beam and which are connected at their outer ends, by means of arms or links, to a head, the beam being supported from said head by block and tackle whereby the beam is lowered and raised to cause the opening and closing of the jaws of the bucket. To the heads of such buckets are applied the supporting means, the upper block of the tackle, a guide for the closing cable or chain, and the upper ends of the links which support the outer ends of the bucket jaws. In consequence of these facts, the head of the bucket is subjected to constant wear at the various points of the aforesaid connections, the wearing action being increased by the presence of sand and grit between the engaging surfaces of the 'parts, such conditions being prevalent in work of the nature wherein these buckets are employed. This makes it necessary to occasionally replace the head in order to obtain a satisfactory operation of the bucket, and this we have found, by experience, to be an expensive and inconvenient practice.

It IS the object of this invention, therefore, to provide a head for grab buckets which is composed of a major head-piece to which may be rigidly secured the various minor parts which are subjected to wear, and to make these wearing parts durable, simple and cheap of production, and to construct the major head-piece in a manner that will permit said minor pieces to be replaced easily and quickly.

The above and further objects we attain by a construction set forth in the claims annexed hereto and illustrated in the accompanyin'g drawings forming a part hereof, wherein Figure 1 is a side e evation of a grab bucket embod ing our invention; and Fig. 2, an end elevation thereof.

Specification of Letters Patent.

Application filed February 17. 1913.

Patented Nov. 17, 1914.

Serial No. 743,909.

In the drawings,.l represents the jaws of the bucket which are rovided, at their upper, inner corners, wit hinge members 2 by means of which the jaws are pivoted to the beam To the outer corners of the jaws are riveted, or otherwise secured, castings 4, the lower ends of which are made angular to fit the corners and to provide flanges through which rivets or other securing means may pass, while the upper ends of said castings are provided with ears 5. Between the ears of each of the castings 4 is pivoted the lower end of one of the arms or links 6 which suspend the outer ends of the jaws 1 from the end of the bucket.

The upper ends of the arms or links 6 terminate in eyes which encircle the end portions of the head shaft 7 and are held thereon by washers and cotter pins 8 and 9 respectively. Fixed upon the head shaft, intermediate of the portions which accommodate the aforesaid eyes, is a casting which will be referred to hereinafter as the major head piece. The major head-piece comprises a cylindrical body portion 10 which is provided, near its ends, with annular flanges 11. Spaced inwardly a slight distance from the flanges 11 are lugs 12 which are rectangular in plan and which project upwardly from the body portion 10 of the headpiece. Projecting from the front and rear sides of the body portion 10, and in a plane other than at right angles to the longitudinal axis thereof, are cars 13. These cars extend slightly above and below the body portion 10 and have rounded corners which are provided with belt holes. Extending in the same direction from the body portion 10, and in a parallel plane with the ears 13, are cars 14. These ears extend outwardly and downwardly and have rounded ends provided with bolt holes which are in alinement with the bolt holes in the lower corners of the cars 13.

The spaces between the cars 13 and 14 are of a width equal to the thickness of the sheave-plates). The upper edges of the sheave-plates 15 are curved inwardly to conform to the lower surface of the body portion '10 of the head-piece, and on either side of this curved portion-the plates are pro vided with bolt holes which are adapted to register with the bolt holes in the ears 13-14 when the upper corners of the plates occu y the spaces tierebetwcen, or bear upon tie outer surfaces of the ears 14. The outer edges of the sheave-plates 15 diverge downwardly to where they join the lower edges in rtunded corners provided with bolt holes for the accommodation of the bolts 16. These bolts pass through all of the plates and carry s acers which separate and properly position the plates along the bolts. Between the plates 15 are contained the upper portions of the sheaves 17 which are journaled upon the shaft 18 mounted within openings in the various plates. Sheave-plates 20 are secured to the upper ends of the cars 13 by bolts 21. Between these plates is journaled the supporting sheave 22.

Secured to the sides of one of the lugs 12, by bolts 25, are angle bars 26. These bars project a suthcient distance beyond the end ofthe lug l2 to accommodate the grooved rollers 27. Cylindrical rollers 28 are journaled between the L-shaped brackets 29, the horizontal tlanges of which are bolted to the corresponding flanges off the angle bars 26, the rollers 28 being somewhat longer than the distance between the centers of the grooved rollers 27. This provides a guard and guide for the closing cable.

From the description thus far, it will be seen that have produced a head construction for grab buclrets wherein the wear is confined to parts which may be cheaply produced and easily replaced and which comprises, besides these minor parts, a major head-piece to which these parts may he rigidly secured, and which is practically indestructible, no wear whatever falling thereupon.

Located centrally upon the beam 3 is a bloclr 30 which is substantially pear shaped in cross section as shown in dotted lines in Fig. 1. This bloclr is positioned upon the beam 3 by the sleeves 3i, the inner ends of which engage the ends of said block and the outer ends of which bear against the inner hinge members 2. The ends of the beams are threaded for the reception of nuts 32 which are locked in place by the cotter pins The upper portion of the block 30 is provided with a longitudinal bolt hole for the bolt 35 which secures the lower ends of thesheave-plates 36 within transverse cuts formed in the upper portion of the block 30. These sheave-plates, with the sheaves 3i which are mounted therebetween, provide the lower bloclr for the bloclr and taclrle.

From Fig. 2 it will be seen that the closing cable all is secured all to the body portion 310 of the bucket head between one of the flanges Ill and the adjacent lug 12, and after passing down and around the first sheave 37 of the lower block, it passes directly vertical to the first sheave Not the upper block, and because of the angular disposition oi this sheave with respect to the axis of the bucket head, the cable 40 is cast downwardly in the plane of the second sheave of the lower block. Passing around this sheave the cable is directed upwardly over the center sheave of the upper block which advances the cable to the plane of the next lower sheave, and after passing therearound and over the last of the upper sheaves it is directed about the last sheave of the lower block whence it passes upwardly between the grooved rollers 27 and the cylindrical rollers 28 ot' the cable guide to the boom or other supporting structure.

Having thus described our invention, what we claim is As a new article of manufacture, a major head-piece for buckets of the character set forth comprising a cylindrical body portion having a plurality of vertical ears extending laterally and downwardly therefrom other than right angles to the longitudinal axis of the head, certain'ol said ears being elongated vertically to provide.

means for the rigid attachment of, and for spacing apart, the plates of the bucket supporting sheave, the downwardly projecting ears spacing apart and rigidly supporting the plates oil a plurality of sheaves.

2. As a new article of manufacture, a major head-piece for buckets of the char actor set forth comprising a cylindrical body portion having a series of vertical ears projecting downwardly and outwardly from the opposite sides thereof at other than right angles to its longitudinal axis, the corresponding ears of both series being in alinenient and all of the ears being parallel to each other, and one ear of one series and the corresponding ear of the other series being elongated vertically, as and for the purpose specified.

l n testimony whereof, we hereunto ailii: our signatures in the presence of two wit nesses.

FRANK ll). CALLAHAN. JAMES J CAMLAHAN.

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